Type-writing machine.



H. V. FENGLER;

TYPE WRlTlNG MACHINE.

nerucmou FILED JULY 9. 1915.

1,256,303. Patented Feb. 12,1918.

2 SHEETS-SHEET l.

Wszs 4 H. V. FENGLER.

' TYPE WRITING MACHINE- APPL ICATION FILED JULY 9. l9l5.

Patented Feb. 12, 1918.

2 SHEETS-SHEET 2.

Lia Y 4 WITN ESSES UNITED STATES PATENT OFFICE.

HE MANN v. FENGLER, or WEST PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 'roUNDERWOOD TYPEWRITER COMPANY, on NEW YoRK, N. Y., A CORPORATION orDELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent. Patented Feb. 12, 1918.

Application filed July 9', 1915. Serial No. 38,853.

To all whom it may concern:

Be it known that I, HERMANN V. Fenc- LER, a citizen of the UnitedStates, residing in West Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Type-Writing Machines, of which the following is a specification.

v This invention relates to typeWrit-ing machines, specially constructedto facilitate the making of typewritten entries on bills or otherwork-pieces which are placed seriatz'm on the machine, 'each bill beingremoved from the machine after the record has been made thereon, beforethe succeeding bill is placed on the machine, while a record sheet isretained on the machine to receive the record copy of a number of sue--a somewhat greater distance than the backward rotation, in ordertosuitably space on the record sheet, the record copies of s'ucceedingbills. The driver while in its normal position of rest is disconnectedfrom the platen to permit the latter to be rotated independentlythereof, while the typewritten entries are being made.

The present invention provides an improved mechanism for operating theplaten in positioning the work-pieces thereon and removing themtherefrom. In accordance with this invention, the return movement of thedriver and the forward rotation of the platen as the driver is returned,may be automatically effected by a motor, conveniently in the form of aspringmotor, wound by the driver during its forward stroke. by themotor, there is a tendency for it to overthrow or be carried beyond itsnormal stop position as the driver completes its return movement and isdisconnectcd from th platen. To prevent such overthrow, the

As the platen is rapidly rotated In practising the invention, the drivermay be loosely mounted for rotation on the platen axle and may have aspeed-multiplying driving connection with the platen by means of a bandconnecting the driver'with a dog-carrying'member rotatable about theplaten axis, the dog being movable into and out of driving en agementwith a platendrlving toothed wiieel or rack connected to rotate with theplaten. The dog is normally spring-held off said wheel, to permitindependent rotation of the platen. 'Shortly after the driver commencesits advance movement, the dog is cammed into driving engagement with thedriving wheel and held thereon during the forward and return movementsof the driver. The means for holding the dog in operative position maycomprise a stationary section. (as for example, the peripheral wall of acasing inclosing the drive wheel and dog) and a movable section operativto hold the dog against its wheel only when the dog, during the returnmovement of the driver, has passed beyond the point at which, during theforward throw of the driver it was engaged with said wheel, whereby therotation of the platen during such return movement is through a. greaterdistance than its rotation during the advance or forward throw of thedriver. \Vhen the driver has been returned by its spring to startingposition, the movable dog-holding section is automatically thrown toinoperative position to thereby release the dog, so that the platen maybe rotated independently of the driver.

. Such movement of the dog-holding section the driver is again advanced,the dog,

(which holds the movable section out of operative position) moves idlyuntil 1t passes beyond the said section, and 1S then reengaged with thedriving wheel and permits said .mo-vable section to be returned'tooperative position.

'lhe distance through which the platen is rotated at each operation ofthe driver may be adjustably controlled by a tape which may also serveas the platen-driving spring, for which purpose one end of the tape maybe connected to the dog-carrying member and the other end connected toan adjustable stationary member. The latter may consist of a cap or endplate for the casing within which said tape the dog and the drivingwheel are contained; saidend plate may be rotatably adjustable andsuitably held at line-space intervals, a graduated scale being providedwith index numbers to indicate for any adjustment, the number ofline-space distances through which the platen may be advanced by anoperation of v the driver.

This present application shows certain features also disclosed in myco-pending application, Serial N 0. 27,303, filed May 11, 1915.

Other features and advantages will hereinafter appear.

In the accompanying drawings:

Figure 1 is a perspective'view of a carriage of an Underwood typewritingmachine, showing my invention as applied thereto.

Fig. 2 is a perspective view of the driver.

Fig. 3 is a front elevation, showing some parts of my improved device insection.

Fig. i is a part sectional plan view, showing the movable dog-retainingsection tripped to release the dog.

' Fig. 5 is a-disassembled perspective view of parts ofjmyvimproveddevice.

Fig. 6 isa fragmentary perspective view of the adjustable cap and thespring for holding said cap as adjusted.

Fig. 7 is a side elevation showing the pants after they have beenreturned to normal position, the tripper having caused the driving dogto be released.

Fig. 8 is a side elevation, showing the driving lever advanced to apoint where the dog has engaged the gear and rotated it a slight amount.

Fig. 9 is a side elevation, showing the relative position of the partsas the driver has about completed its return movement.

Fig. 10 is a sectional side elevation showing my improved paper guide,and also showing diagrammatically the means for feeding and holding'thework-sheet with the platen.

The usual platen 1 of an Underwood typewriting machine is rotatablymounted on an axle 2 in the end plates 3 of the platen limited extentfor inserting, adjusting, or

removing work-sheets. The platen may also be rotated in line-feeddirection by the usual line-spacing mechanism comprising a line spacelever 5 to operate a slide 6 carrying" a pawl 7, which engages a ratchetwheel 8 fast on the platen axle.

The platen may be rotated to bring the work-sheets around to position toreceive impressions from types'9', by the fingerwheels 4-, or byrepeated operations of the line-spacing mechanism, the work-sheets beingheld against theplaten by the usual feed rolls 10 and 11 (Fig. 10).

In making out bills and the like, it is customary to make at the'sametime a record copy of the data on each bill. This record copy is usuallymade on a sheet considerably larger than'the bills, so that the data ofa nuinber of bills may be placed on one sheet. The bill and record sheetand the carbon forthe record sheet are usually placed on the machine andmoved around to the printing point of the machine together.

After the bill has been written the feed rolls 10 and llare'moved awayfrom the platen in the usual manner, and the .bill with its carbon sheetis drawn out of, the front of the machine by hand. The record sheet isheld to the platen during the removal of the bill by the usual paperfinger rolls 12.

\Vhen the bill has been removed from the machine it is desired to movethe record sheet back to bring the last typewritten line thereon intosuch a position that when the platen is rotated to bring the next billinto printing position, the first line of writing thereon will closelyfollow on the record sheet, the last line of the succeeding bill.

In providing an improved device for mov ing the platen b'ackwardly tothus receive the new bill, a driving lever 13 loosely mountcdon theplaten axle 2 is provided at its upper end with a stud 14 to which ametal band 15 is attached. The band 15. extends downwardly from the stud14. and is guided over a pulley 16 on a bracket 17 fixed to the endplate 3. From said pulley the'band extends through an opening 18 in thecasing 19 of the mechanism and iswound on and fastened to a member 20loosely mounted on the platen axle. The

member 20 is provided with a flange portion 21 upon which a leaf-spring22 carrying a dog 23 is fast.

When the dog-carrying member is rotated during the first part of theforward movement of the driver 13, the dog 23 strikes against a camsurface 24 at an opening 25 in the casing 19 and is forced, as shown inFig. 8, against the tension of its spring 22, through an opening 26 inthe flange 21 into engagement with a gear 27 fast on the platen axle 2.The dog 23 is held in engagement with the gear 27 bythe inner surfaceofthe casing 19, thus causing the platen to be coupled with and drivenby the dog-carrying member 20 which in turn is connected to be rotatedby the driver 13 through the band 15.

The driver 13, thus connected to the platen, when drawn forward to movethe record sheet backwardly, is stopped at the desired position toreceive anew bill and carbon the form of a clock spring 28 havingconnections to the dog-carrying member20 and the casing 19, whereby therotation of the dogcarrying member having fully wound the tape 28 isstopped thereby. The tape'28 has its inner end fast to a hub 29 of adisk 30 loosely mounted on-the platen axle 2 and connected to thedog-carrying member 20 by means of projections 31 on the disk 30 whichenter notches 32 in the dog-carrying member 20 when the parts areassembled. The outer end of the tape 28 is held against movement by apin 33 on a disk 34 which may form a cap for the casing 19, said tape 28having a looped portion 35 which may be slid over said pin 33.

In makingout bills or the like, worksheets having printed headings ofvarious sizes may be used. As it is not desired to write on theseheadings, the platen with the record sheet must.be rotated backwardlysufliciently to bring the last line of writing done on the last bill andthe first line of writing on the newbill close together on the recordsheet. Thus the mechanism for stopping the platen must be variedaccording to the number-of line-spaces the first line of writing on thebill is from the top edge of the bill.

In order to vary the stopping point of the platen, or in other words, tovary the length of throw of the driver, the cap 34 carrying thefloating'end of the spring 28 is mounted to be angularly adjustable,whereby the spring 28 may be wound or unwound as desired to eitherincrease or decrease the extent of rotation that can be given to theplaten before. it is stopped. The cap 34 is normally held against thecasing 19 by a spring 36 which forces a projection 37 on the cap intoone of a series of notches 38 on the casing 19, said projection holdingthe cap 34 in its adjusted position. To adjust the stopping device for abillhead, for inoperative then allows the spring 36 to move the capagainst the casing so that the projection 37 will enter the notch 38with which it is in register.

After the record sheet has been moved back, the new bill and its carbonsheet are placed on the machine behind the record sheet, to be fedforward to the printing position'on the return movement of the driver13. To facilitate the insertion of the bill and carbon sheet, the recordsheet is held away from the paper table by blocks 41 which may form partof, or may be removably attached to lateral guide plates 42, adjustablymounted on the paper table. The guide plates 42 are provided withupwardly extending flange portions 43 which form gages for the lateraledges of the record sheet while the inner vertical faces 44 of theblocks 41 serve as lateral guides to the bills and carbon sheets. Thusit will be seen that with the record sheet held off the paper table, thebill and carbon sheet may be placed on the paper table and allowed todrop free from any interference of the record sheet, into position to begripped between the platen and.feed rolls, and to be fed around toposition to receive type impressions with the record sheet.

While inserting new sheets, the operator retains the driver 13 in itsforward position against the tension of a spring 45. This spring iswound on a hub portion 46 of the dog-carrying member 20, having itsinner end fast thereto and having its outer end provided with a loopportion adapted to be slipped over a pin 46" on the casing 19 when theparts are assembled. This spring is wound by the forward movement of thedriver 13-, and serves as a motor for returning the driver and turningthe platen forwardly, that is, in linefeed direction. When the operatorreleases the driving lever 13 after the work-sheets have been placed onthe machine, the spring motor 45 rotates the dog-carrying member 20 anddrives the platen through the dog 23 and gear 27in line-feed direction,until the driver 13 is stopped'by the bracket 17 which is fixed to theend plate 3 of the platen frame. The dog is held in engagement with thegear during part of the return movement of the driver, by the innerperiphery of the casing 19, and during the final portion of said returnmovement by a movable section, trap or gate 47, which extends across theopening 25 in the casing. The movable been stopped, thus eliminating 47about. its

' sheet.

section 47 having an arm portion 48 pivoted to the'casing 19 and beingguided beneath a block 49 at its other end normally tends to move overthe opening 25, being urged .by a spring 50 bearing against a pin 51 onThe movement of the section v pivot may be limited-by the block 49. Y

- After the platen and driver have been said section.

stopped bythe bracket 17, a block 52, car

ried with the driver, but movable relatively thereto as by means of aconnection comprising a leaf spring 53 fixed to an arm 54 on the driver,is caused byits inertia to vibrate. The block 52 carries a downwardlyextending pivoted dog 55 .adapted to operate a releasing arm 56pivotally mounted in on the block 49. As the block- 52 moves forward,the dog 55 strikes the releasing arm 56, but rides idly thereover, thedog swinging rearwardly and upwardly about 7 its pivot.

The weight 52' carried forward by momentum beyond its normal sto pingposition, immediately swings or kicks b ack, causing the dog 55 to swingsaid releasing arm so that a lug 57 thereon swings the section 47 awayfrom the opening 25, and thus allows the spring 22 carrying the dog 23to move the dog out ofengagement.

with the gear 27. This uncouplin action takes place after the platen andhan le have the danger of overthrow. The bill now being in properposition, may be written upon in the usual manner, the platen beingentirely free from line of data thereon will appear several linea spacedistances apart from the last hne of data of the preceding bill on therecord It will be understood that when the dog is moved by its spring 22away from the gear, the movable section 47 is held by the dog away fromthe opening 25 until the dog has again been moved into engagement;erative to drive the gear in the opposite scope of the invention, andportions of the improvements may be used without others. Havlng thusdescribed my invention, I claim:

L'The combination with a revoluble platen, of a-cra'nk or handlenormally disconnectedfrom the platen, releasable means: to lock saidcrank and platen together to rotate backwardly and forwardly, a stop to'arrest the return stroke of the platen and crank while they remainlocked together,

and a part connected with the crank to move by momentum after sucharrest, and having means to efl'ect an unlocking of the crankand platen.

2. The combination .with a revoluble platen, of .a crank or handlenormally disconnected from the platen, releasable means to locksaidcrank and platen together for backward and forward rotation, a motorto return said crank to normal position tp" V getherwith said platen, astop to arrest such return stroke effected by said motor, whereby saidplaten and crank remain locked together after their arrest, a weightconnected to be driven by said motor during the return ofthe crank andplaten and to keep moving by its momentum after such arrest. of thecrank and platen, and means controlled by said weight during suchsubsequent-movement, for eflecting an unlocking of the crank and platen.

3. The combination with a revoluble:

platen and a driver normally disconnected therefrom, of means dependentupon the. forward movement of the driver to couple it to the platen, amotor to return the platen and driver, a stop to arrest the platen anddriver, a gate normally in ineflective position, means dependent uponthe movement of said driver to move said gate to eflective positiontoprevent a releasing movement of said coupling means, a weight connectedto said driver to operate by momentum after the driver is arrested atits return stroke, means operated by said weight to open said gate, andmeans effective to operate on said coupling means to release the driverfrom the platen when said gate is open.

with the gear, at whichtime the spring 5O@ 4. The combination with arotary platen returns the section over the opening.

In order to insure. that the dog 23 will properly drive the gear 27 andplaten in both directions, the do comprises oppositely inclined teeth wich cofiperate respectively with two ratchet wheels having oppositelyinclined. teeth, one tooth of the pawl being. operative to drive thegear in one direction, and the other tooth being opand a driver having aforward and return movement from a normal position of rest, of a stop tolimit the return movement of the driver, means to automatically connectthe driver with the platen after the driver has moved forwardly through"a predetermined distance from its starting position, and thereby causethe laten to be rotated by the driver during t e remainder of the fortoautomatically disconnect the driver from the platen, said disconnectingmeans comprising a weighted trip device moving with the platen anddriver during the return of the latter and operable by its momentum whenthe driver and platen are brought to rest to efiect the release of thedriver from he platen to permit the latter to be rotated independentlyof the driver. I

5. The combination with a rotary platen, of a driver, connecting meansbetween the driver and platen for rotating the platen in one direction,said means comprising a dog operated by the driver and a toothed wheelconnected to the platen, means for holding the dog in engagement withsaid wheel, a motor to automatically rotate the platen in the reversedirection andreturn the driver,

and releasing means including a weight op-' erated by its momentum torelease the dog from said wheel after the platen has been brought torest at the completion of the return movement of the driver.

6. The combinationwith a rotary platen, of a driver having a limitedadvance and return movement from a normal position of rest, a dcgconnected to be operated by the driver, a rack connected to rotate withthe platen, said dog moving idly with the driver during the initialportion of its advance movement, means to move the dog into engagementwith itsraok, and hold it in such engagement during the remainder of theadvance movement of the driver and thereby rotate the platen backwardlyor in an antiline-spacing direction, a motor to automatitally rotate theplaten in a forward direction and through said dog to return the driver,a stop to limit the return movement of the driver and thereby alsoarrest the platen, additional means to hold the dog in engagement withits rack after the'platen, during the return of the driver, is advancedbeyond the point at which the dog was engaged therewith, whereby theplaten is rotated forwardly through a greater distance than hackwardlv,and means to automatically release the dog from its rack when the platenhas completed its forward movement and the driver has been brought torest by epgagement with its stop.

7. The combination with a rotary platen, of a driver having a limitedadvance and return movement from anormal position of rest, a dogconnected to be operated by the driver, a rack connected to rotate withthe platen, said dog moving idly with the driver during the initialportion of'its ad Vance movement, means to move the dog into engagementwith its rack, and hold it in such engagementduring the remainder of theadvance movement of the driver and thereby rotate the platen backwardlyor in an anti-line-spacing direction, a motor to automatically rotatethe platen in a forward direction and through said dog to return thedriver, a stop to limit the return movement of the driver and therebyalso arrest the platen, additional means to hold the dog inengagemen'twith its rack after the platen, during the return of the driver, isadvanced beyond the point at which the dog was engaged therewith,whereby the platen is rotated forwardly through a greater discharge thanbackwardly, means to automatically release the dog from its rack whenthe platen has completed its forward movement and the driver has beenbrought to rest by engagement with its stop, said dog-releasing meanscomprising a throw-01f device to move said last-mentioned holding meansout of engagement with the dog, and an inertia-controlled trip deviceoperated by its inertia after the driver has been brought to rest toactuate said throw-off device.

8. The combination with a rotary laten, of a driver, a toothed wheelconneotec to rotate with the platen. a dog operated by the driver andspring-held off said wheel while the driver is in its normal position ofrest, means to hold the dog in engagement with the said wheel, saidmeans oomprisin a stationary holding section operative after the driverhas been. advanced through a predetermined distance from its normalposition of rest to hold the dog against said wheel during the remainderof the advance movement of the driver, and during the return of thedriver to the point at which the dog was engaged with the wheel, amovable dog-holding section operative to hold the dog in drivingengagement with its wheel return movement to automatically actuate saidmovable holding section to release the doo and thereby permit the platento be rotated independently of the driver.

" 9; The combination with a rotary platen, of a driver, a toothed wheelconnected to rotate with the platen, a dog operated by the driver andspring-held off said wheel while the driver is in its normal position ofrest. means to hold the dog in engagement with the said wheel, saidmeans comprising a stationary holding section operative after the driverhas been advanced through a predetermined distance from its normal position of rest to hold the dog against said wheel during the remainderof the advance movement of the driver,.and during the return of thedriver to the point at which the dog was engaged with the wheel, amovable dogholding section operative to hold the dog in drivingengagement with its wheel during the remainder of the return movement ofthe drivel, a stop tolimit the return movement of the driver, means toautomatically release the dog from said wheel, comprising dog to permitthe platen to rotate independently of the driver.

10. The combination with a rotary platen, of a platen-rotating mechanismoperable at each complete cycle of operations to rotate the platenbackwardly through a; predetermined fixed distance andthen rotate theplaten forwardly through a predetermined fixed distance greater than itsbackward rotation, said mechanism comprising a driver having an advanceand return movement from its normal position of rest, a stop to limitthe return movement of the driver, a driving wheel connected to rotatewith the platen, a dog movable into and out of engagement with saidwheel, a speed-multiplying connection between said dog and the driver,said dog normally held out of engagement with the wheel while the driveris in its normal position of rest. means to hold the dog in engagementwith its wheel comprising a movable holding section inoperative duringthe initial advance movement of v the driver, and a fixed holdingsection operable to hold the dog in connection with the driving wheelduring the remainder of the advance movement of the driver and duringthe 7 corresponding portion of the return movement of the driver, saidmovable holding section operable during the remainder of the returnmovement of the driver where by the platen is rotated forwardly agreater distance during the return of the driver than it is rotatedbackwardly during the advance of the driver, a spring motor to drive theplaten in a forward direction and return the driver to said stop, andmeans operable automatically to move said dogholding section at thecompletion of-the return movement of the driver to release the dog andpermit the platen to be rotated independently of the driver.

11. In a typewriting machine, the combination with a rotary platen. ofplaten-driving means having a limited back and forth movement andoperable to rotate the platen in one direction, a spring to rotate theplaten in the opposite direction, and a tape to limit the rotation ofthe platen by said driving means.

12, In a typewriting machine, the combination with a rotary platen, of adriver to driver.

13. In a typewriting machine, the combination with a rotary platen, of adriver to rotate the platen a predetermined fixed disoperable to rotatethe-platen in the reverse direction and to return the driver, one ofsaid springs connected at its opposite ends respectively to a partrotating with the platen and a stationary part, whereby the spring alsoserves to limit and determine the extent of rotation of the platen bythe 'tance in one direction, returning sprlngs driver, and a stop tolimit the return movement of the driver and thereby determine its normalposition 'of rest, said stationary part being adjustable to adjustablydetermine the distance through which the platen may be rotated by saiddriver.

14.,T he combination with a platen, of a manually operable platen-driverhavingan advance and return movement, a dog, a dogcarrying membermounted for rotation about the platen axis, a toothed wheel con nectedto rotate with the platen, means forming a driving connection betweenthe dogcarrying member and said driver, means providing a stationaryholding surface for holding the dog in driving engagement with saidwheel as the driver advances and returns, a spring for rotating theplaten and returning the driver, and means to shifta section of saidsurface to release the dog as the driver completes its return movement.

15. The combination with a platen, of a manually operable platen-driverhavin an advance and return movement, a dog, a og-' carrying membermounted for rotation about the platen axis, a toothed wheel connected torotate with the platen, means forming a driving connection between thedog-carrying member and said drivenpsaid driving connection comprising aflexible band and a guide pulley over which the band runs, means forholding the dog in driving engagement with said wheel as the driveradvances and returns, a spring for rotating the platen and returning thedriver, and means to automatically release the dog as the drivercompletes its return movement.

16. The combination with a rotary platen and platen axle, of means torotate the platen through predetermined fixed distances first in onedirection and then in the opposite direction, said means comprising adriving dog, a dog-carrying member loosely mounted for rotation on theplaten axle, a

toothed wheel with which the dog may engage, a casing inclosing saiddog-carrying member and wheel, and providing a means to hold the dog inengagement with the wheel, a driver connected to said dog-carryingmember for rotating the latter and thereby rotating the platen in onedirection, means to return said dog-carrying member and rotate theplaten, said returning means comprising a spring connected to the saiddog-carrying member and easing respectively, and thereby limiting therotation of said member, and means to automatically re-' lease the dogfrom said member.

17. The combination with a rotary platen and platen axle, of means torotate the platen through predetermined fixed distances first in onedirection and then in the opposite direction, said means comprising adriving dog, a dog-carrying member loosely mounted for rotation on theplaten axle, a toothed wheel with which the dog may engage, a casinginclosing said dogcarrying member and wheel, and providing a means tohold the dog in engagement with the wheel, a driver connected to saiddogcarrying member for rotating the latter and thereby rotating theplaten in one direction, means to return said dog-carrying member androtate the platen, said returning means comprising a spring connected tothe said dogcarrying member and easing respecti ely, and therebylimiting the rotation of said member, and means to automatically relea"ethe dog from said member, said casing comprising a rotatably adjustableend plate or cap to which the spring is connected to adjustably limitthe rotation of the platen by saiddriver, anda graduated index toindicate the number of line-space distances through which the platen maybe rotated by the driver.

18. In a typewriting machine, the combination with a platen, of a driverarranged to rotate the platen a predetermined fixed distance in onedirection and then return it, and a tape connected at its opposite endsrespectively. to said driver and to a stationary part, said tape beingof such length and so arranged that it limits and determines the extentof rotation of the platen by the driver. 0

19. In a typewriting machine, the combination with a platen, of a driverarranged to rotate the platen a predetermined fixed distance in onedirection and then return it, a tape connected at its opposite endsrespectively, to said driver and to a stationary part, said tape beingof such lengthand so arranged that it limits and determ nes the extentof rotation of the platen by the driver, and adjusting means forshifting one s end of said tape to vary said extent of rotation of theplaten by the driver.

20. In a typewriting machine, the combination with a platen, of a driverarranged to rotate the platen a predetermined fixed distance in onedirection and then return it, a tape connected at its opposite endsrespectively, to said driver and to a stationary part, said tape beingof such length and so arranged that it limits and determines the extentof rotation of the platen by the driver, said stationary part rotatablyadjustable to thereby vary the throw of the driver, and a scale toindicate the length of throw of the driver for which said part isadjusted.

21. In a typewriting machine, the combination with a rotary platen, of adriver to rotate the platen a predetermined fixed distance in onedirection, a returning spring operable to rotate the platen in thereverse direction, and 'to return the driver, a tape connected at oneend to a part rotating with the platen and Wound thereon as the platenrotates, and a stationary part to which the other end of the tape isconnected, said tape being of such length and so arranged that as it iswound on said rotating part it limits and determines the extent ofrotation of the platen by the driver.

22. In a typewriting machine, the combination with a rotary platen, of adriver to rotate the platen a predetermined fixed dis tance in onedirection, a returning spring operable to rotate the platen in thereverse direction, and to return the driver, a tape connected at one endto a part rotating with the platen and wound thereon as the platenrotates, a stationary part to which the other end of the tape isconnected, said tape being of such length and so arranged that as it iswound on said rotating part it limits and determines the extent ofrotation of the platen bv the driver, said stationary part beingadjustable to vary said extent of rotation, and a scale arranged toindicate said extent of rotation.

23. The combination with a rotary platen, of a driver. means to connectthe driver to the platen for rotating the platen, a stop to limit thethrow of the driver, and means carried with the driver and operable byits momentum to automaticallvdisconnect the driver from the platen whenthe driver is arrested by said stop, thereby permitting the platen to berotated separately from the driver.

24. In a typwriting machine, the combination with a platen. of a driver,means to form a positive driving connection between said driver and theplaten, a motor to rotate the driver and thereby rotate the platen, astop to arrest the driver and platen, and a releasing device carriedwith the driver and moved relatively to the driver by its momentum whenthe driver is arrested. said releasing device operable by said relativemovement to efieet a. release of the driver from the platen, permittingthe latter to be rotated separately from the driver.

25. .The combination with a revoluble platen and a'platen frame, of ahandle, a band connected to said handle, a pulley mounted on said platenframe over which said band runs, a drum or driver mounted to turn aroundthe platen axis and con nected to the other end of said band to bedriven thereby, means connected with said handle for coupling said drumand platen to rotate together during the initial and return strokes ofsaid handle, a spring to return said drum and platen, and means forautomatically uncoupling the driver and platen.

26. The combination with a revoluble platen and a platen frame, of ahandle, a band connected to said handle, a pulley mounted on said platenframe over which said band runs, a drum or driver mounted to turn aroundthe platen axis and connected to the other end of said band to be drivenmore than an entire revolution thereby, means connected with said handlefor coupling said drum and plat-entorotate together during the initialand return strokes of said handle, a spring to return said drum andplaten, and means for automatically uncoupling? the driver and platen.

The combination with a revoluble platen and a platen frame, of a handle,a band connected to said handle, a pulley mounted on said platen frameover which said band runs, a drum or driver mounted to turn around theplaten axis and connected to the other end of said band to be driven forcoupling said drum and platen to rotate together during the initial andreturn strokes of said handle, a spring to return said drum and platen,means for automatically uncoupling the driver and platen, and

means for limit ng the stroke of the platen,

comprising a second hand connected at one end to the drum or driver andanchored at the other end, whereby the driver and platen are permittedto rotate until said second band is'wound up.

'28-. The combination with v a revoluble band connected to said handle,a pulley mounted on said plate frame over which thereby, means connectedwith said handle said band runs. a drum or driver mounted to turn aroundthe platen axis and connected to the other end'of said band to be driventhereby, means connected with said handle for coupling said drum andplaten to rotate together during the initial and return.

band is wound up, and means for effectingadjustment of the anchorage, tovary the. ex-

tent of platen rotations. V 1

HERMANN V. FENGLER;

Witnesses:

1 WILLIAM A. Hermann,

H. L. CASSELBERRY. e

platen and a platen frame, of a handle, a

